- 您现在的位置：买卖IC网 > PDF目录69043 > PFS763HG (POWER INTEGRATIONS INC) 4.16 A SWITCHING CONTROLLER, 70 kHz SWITCHING FREQ-MAX, PZIP16 PDF资料下载
参数资料
| 型号： | PFS763HG |
| 厂商： | POWER INTEGRATIONS INC |
| 元件分类： | 稳压器 |
| 英文描述： | 4.16 A SWITCHING CONTROLLER, 70 kHz SWITCHING FREQ-MAX, PZIP16 |
| 封装： | HALOGEN FREE AND ROHS COMPLIANT, PLASTIC, SIP-16 |
| 文件页数： | 2/36页 |
| 文件大小： | 4692K |
| 代理商： | PFS763HG |
第1页当前第2页第3页第4页第5页第6页第7页第8页第9页第10页第11页第12页第13页第14页第15页第16页第17页第18页第19页第20页第21页第22页第23页第24页第25页第26页第27页第28页第29页第30页第31页第32页第33页第34页第35页第36页
Rev. C 02/11
10
TFS757-764HG
www.powerint.com
A resistor R
FB is connected from the BYPASS pin to the
FEEDBACK pin. This resistor feeds current into the FEEDBACK
pin (who’s voltage is clamped to approximately 1 V during this
detection period). The current into the FEEDBACK pin is
determined by the value of the resistor, and thus the input
current (and indirectly the resistor value), select an internal
current limit according to the following table.
Main Line Undervoltage Detection (UV)
The LINE-SENSE pin resistor is connected to V
IN and generates
a current signal proportional to V
IN. The LINE-SENSE pin voltage
is held by the device at 2.35 V. The LINE-SENSE pin current
signal is used to trigger under/overvoltage thresholds for both the
standby and main converters. Assuming a LINE-SENSE pin
resistor of 4 MW, the standby will begin operating when the
LINE-SENSE pin current exceeds the (I
L(SB-UVON)) threshold,
nominally approximately 100 V. However the main is still held in
the off-state, until the LINE-SENSE pin current exceeds the
(I
L(MA-UVON)) threshold, nominally 315 V for 4 MW. There is
hysteresis for both main and standby undervoltage-off
thresholds, to allow sufficient margin to avoid accidental
triggering, and to provide sufficient margin to meet hold-up time
requirements. Bear in mind that the main converter may start to
loose regulation before it finally shuts down. This is because
the dynamic duty cycle limit may clamp the duty cycle below
that required for regulation at lower input voltages. Once the
input voltage falls below the 215 V (I
L(MA_UVOFF)) threshold, the
main will shutdown but standby will continue to operate. The
standby will turn off when the input voltage drops below
approximately 40 V (I
L(SB-UVON)).
Figure 9.
Current Limit Selection.
Table 3.
FEEDBACK Pin Main Current Limit Selection.
I
FB
(Threshold)
I
LIMIT
R
EN(SELECT)
(1%)
0.0-5.1 mA
L1
60%
mA
Open
kW
5.1-11.9 mA
L2
80%
mA
511.0
kW
11.9-23.8 mA
L3
100%
mA
232.0
kW
UV(ON)STANDBY, I(L) = 25 A
4.7 V
1 V
5.7 V
I(L)
V(BP)
V(FB)
V(EN)
T
SELECT - current limit selection occurs here during
device start-up and before power supply switching
2.7 V
2.2 V
6.0 V after
standby
acheives
regulation
PI-5975-102610
Figure 8.
Duty Cycle Limit vs. Ratio of R Pin Current Over L Pin Current.
0.5
1.0
1.5
2.0
3.0
2.5
IR/IL
Duty
Cycle
Limit
0.7
0.6
0.5
0.4
PI-5977-061010
IL = 60 A
IL = 90 A
IL = 100 A
IL = 115 A
相关PDF资料 |
PDF描述 |
|---|---|
| PFS758HG | 2.62 A SWITCHING CONTROLLER, 70 kHz SWITCHING FREQ-MAX, PZIP16 |
| PFS759HG | 2.94 A SWITCHING CONTROLLER, 70 kHz SWITCHING FREQ-MAX, PZIP16 |
| PGA112AIDGSR | SPECIALTY ANALOG CIRCUIT, PDSO10 |
| PGA113AIDGSRG4 | SPECIALTY ANALOG CIRCUIT, PDSO10 |
| PGA112AIDGSRG4 | SPECIALTY ANALOG CIRCUIT, PDSO10 |
相关代理商/技术参数 |
参数描述 |
|---|---|
| PFS764HG | 制造商:POWERINT 制造商全称:Power Integrations, Inc. 功能描述:Combined Two-Switch Forward and Flyback Power Supply Controllers with Integrated High Voltage MOSFETs |
| PFS7S 230/9V | 制造商:Aten International 功能描述:Bulk |
| PFS7S 230V/11 | 制造商:Aten International 功能描述: |
| PFS7S 230V/17V | 制造商:Aten International 功能描述: |
| PFS7S 230V/23 | 制造商:Aten International 功能描述: |
发布紧急采购，3分钟左右您将得到回复。